Type wheel



June 24 1924 1,498.75]

F. A. PUTNAM ET AL TYPE WHEEL Filed Nov. 22; 1922 lnvenTor.

Fred A.PuTnc1m Charles F. Robbins bymwkm Patented June 24, 1924. V

entrain 1 starts i teeter FRED A. PUTNAM AND CHARLES F. ROBBINS, OF.KEENE, NEW HAMPSHIRE, AS-

SIGNORS TO MAB/REM MACHINE COMPANY,

PORA'IION or MASSACHUSETTS.

0F BOSTON, MASSACHUSETTS, A-coa- TYi-PE W EL.

To all whom it may concern:

Be itknown that we, FRED A. PUTNAM and CHARLES F. ROBBINS, citizens of the United States, and both residin at Keene, county of Cheshire, State of i ew Hampshire, have invented an Improvement in Type lVheels, of whichthe following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to type wheels such as are used in those printing or marking machines that have a plurality of independentlyadjustable type wheels, each bearing a plurality of type characters. EX- emplifications of such marking machines will be found in United States Patents No. 1,131,865 and No. 1,131,959, both dated March 16th, 1915.

In using marking machines of this type it frequently happens that it is desirable to change one or more of the type characters of one or more of the type wheels and where the type characters are integral with the type wheels such a change necessitates the use of a new type wheel. To avoid this type wheels have been made with removable or interchangeable type characters and our invention relates to a type wheel having this construction.

One of the objects of our invention is to provide a novel type wheel having type carrying members separate from the body of the wheel and constructed so that each type carrying member may be readily attached to the wheel simply by the use of pliers, the construction being such that a type carrying member can also be readily removed from the type wheel. An advantage of this construction is that if it becomes necessary to change one or more of the type characters on a type wheel, such change can be effected in the shop where the machine is in use and by using such tools as will be found in the shop.

In order to give an understanding of the invention we have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claim.

Fig. 1 is a side view of a type wheel embodying our invention;

,Appliceition filed November22,1922. serial No. 602,557.

F ig. 2 is an enlarged sectional view on the line 2, Fig. 1 showing one step in the operation of securing the type 'member to the type wheel;

Fig. 3 is a similar view showing member secured to the type wheel;

member removed; i

Fig. 5 is a perspective view of the end of one of the type-bearing arms of the type wheel.

The type wheel herein shown comprises a body portion 1 which may have any suitable shape depending on the construction of the marking machine with which it is used. This body portion is shown as having a plurality of radially-extending arms 2 each adapted to support a type member 3. Each type member 3 has on its face a type character 4. The type members 3 are separable from the arms 2.

Each arm 2 is formed in its end with a slot 5 which extends circumferentially thereof and each type member 3 has a body which is co-extensive with the end of the arm and is provided with a fin 6 adapted to enter and which fits the slot 5. Each arm 2 is provided with a transverse aperture 7 which crosses the slot 5 and each fin 6 is provided with an aperture 8 which is aligned with the aperture 7 when the type. member is in place. The aperture 7, however. is slightly larger than the aperture 8 as clearly seen in Fig. 2. Each type memher is retained in place by a pin 9 which is preferably formed of soft ductile metal.

the type 7 Fig. 4 is a perspective view of the type In fact this pin 9 may be cut out from wire 0f the right size. The pin 9 normally fits the aperture 8 in the fin 6 but is slightly smaller than the aperture 7.

In securing a type member to the arm 2 said type wheel will be placed in position on the end of the arm with the fin 6 occupying the slot 5 and with the aperture 8 in alignment wit-h the aperture 7 and then the pin 9 will be inserted through the aligned apertures as shown in Fig. 2. The pin 9 is then subjected to endwise pressure which enlarges the ends ofthe pin and causes such ends to fill the enlarged aperture 7 as shown in Fig. 3.

Since the pins 9 are formed of very soft wire the upsetting of the pins, as shown in Fig. 3, can be accomplished by means of an ordinary pair of pliers, especially since the type Wheels are relatively thin. Moreover because of the soft nature of the pin 9 it can be readily driven out of the arm 2 by means of asmall punch whenever a change is desired in the type member. If, therefore, at any time it is desirable to make a change in one or more of the type characters on a type wheel it is simply necessary to remove the type wheel from the marking machine, drive out the pins 9, replace the type member with the desired type member, insert a new pin into the aligned apertures 7, 8 and then subject the pin to endwise pressure between the jaws of a pair of pliers. This can be done by anyone and without the use of any special tools so that the operation of changing the type wheels is Very greatly simplified.

We claim:

A type wheel having a body portion formed With radially-extending type-carrying arms, each provided at its end with a groove extending in a circumferential direction, a type member carried by the end of each arm, each type member having a fin occupying the groove of the arm and the arm and fin having aligned apertures, the aperture in the arm being of uniform diameter throughout and larger than that in the fin and an anchoring pin of soft metal extending through and filling the aligned holes.

In testimony whereof, we have signed our names to this specification.

FRED A. PUTNAM. CHAS. F. ROBBINS. 

